nt標頭檔案:

// http.h
#ifndef HTTP_H
#define HTTP_H
#include <QObject>
#include <QBuffer>
#include <QHttp>
#include <QUrl>

class Http: public QObject
{
    Q_OBJECT

public:
    Http(QObject *parent = 0);
    ~Http();

    void setUrl(const QUrl &url);
    void setPort(quint16 port)
 
;
    void get();
    void post(const QString &script);
    bool error();
    QByteArray read();

protected:
    QHttp *http;
    QUrl _url;
    QBuffer reply;
    quint16 _port;
    int _id;
    bool _error;

protected slots:
    void requestStarted(int);
    void requestFinished(int, bool);
    void
 
 dataSendProgess(int, int);
    void dataReadProgess(int, int);
    void responseHeaderReceived();

signals:
    void done();
}

#endif // HTTP_H

原始檔:

// http.cpp
#include "http.h"
#include <iostream>

Http::Http(QObject *parent)
    :QObject(parent)
{
    http = new QHttp(this);
    _port = 80;

    connect
 
(http,SIGNAL(requestStarted(int)),
            this,SLOT(requestStarted(int)));
    connect(http,SIGNAL(requestFinished(int,bool)),
            this,SLOT(requestFinished(int,bool)));
    connect(http,SIGNAL(dataSendProgress(int,int)),
            this,SLOT(dataSendProgess(int,int)));
    connect(http,SIGNAL(dataReadProgress(int,int)),
            this,SLOT(dataReadProgess(int,int)));
}
Http::~Http()
{
    delete http;
    disconnect(this);
    QObject::~QObject();
}

void Http::setUrl(const QUrl &url)
{_url = url;}
void Http::setPort(quint16 port)
{_port = port;}
void Http::get()
{
    http->setHost(_url.host(),_port);
    _id = http->get(_url.path(),&reply);
}
void Http::post(const QString &script)
{
    http->setHost(_url.host(),_port);
    _id = http->post(_url.path(),script,&reply);
}
bool Http::error()
{return _error;}
QByteArray Http::read()
{return reply;}

void Http::requestStarted(int id)
{
    if (id != _id)
        return;
    std::cout << "正在連線至伺服器"
              << qPrintable(_url.host())
              << " ..." << std::endl;
}
void Http::requestFinished(int id, bool error)
{
    if (id != _id)
        return;
    std::cout << "正在斷開與伺服器"
              << qPrintable(_url.host())
              << "的連線 ..." << std::endl;
    if (!error)
        std::cout << "成功與"
                  << qPrintable(_url.host())
                  << "交換資料" << std::endl;
    else
    {
        switch (http->error())
        {
        case QHttp::HostNotFound: std::cerr << "找不到指定伺服器"
                                            << qPrintable(_url.host())
                                            << std::endl;break;
        case QHttp::ConnectionRefused: std::cerr << "伺服器"
                                                 << qPrintable(_url.host())
                                                 << "拒絕連線請求" << std::endl;break;
        case QHttp::UnexpectedClose: std::cerr << "與伺服器"
                                               << qPrintable(_url.host())
                                               << "的連線被伺服器意外地關閉" << std::endl;break;
        case QHttp::InvalidResponseHeader: std::cerr << "響應檔案"
                                                     << qPrintable(_url.path())
                                                     << "無效" << std::endl;break;
        case QHttp::WrongContentLength: std::cerr << "資料長度失效" << std::endl;break;
        case QHttp::Aborted: std::cerr << "與伺服器"
                                       << qPrintable(_url.host())
                                       << "的連線突然中斷" << std::endl;break;
        case QHttp::ProxyAuthenticationRequiredError: std::cerr << "與代理伺服器的連線需要身份驗證" << std::endl;
        case QHttp::AuthenticationRequiredError: std::cerr << "與伺服器"
                                                           << qPrintable(_url.host())
                                                           << "的連線需要身份驗證" << std::endl;break;
        default: std::cerr << "發生了一個未知錯誤" << std::endl;break;
        }
    }
}
void Http::dataSendProgess(int done, int total)
{
    std::cout << "正在向伺服器"
              << qPrintable(_url.host())
              << "傳送資料 ..." << std::endl
              << "總資料大小: " << total << "KB" << std::endl
              << "已傳送資料大小: " << done << "KB" << std::endl
              << "待發送資料大小: " << total-done << "KB" << std::endl
              << "已傳送資料佔比: " << 100*done/total << "%" << std::endl
              << "待發送資料佔比: " << 100-100*done/total << "%" << std::endl;
}
void Http::dataReadProgess(int done, int total)
{
    std::cout << "正在從伺服器"
              << qPrintable(_url.host())
              << "接受資料 ..." << std::endl;
    if (total)
        std::cout << "總資料大小: " << total << std::endl;
    std::cout << "已接受資料大小: " << done << std::endl;
    if (total)
        std::cout << "待接收資料大小: " << total-done << std::endl
                  << "已接受資料佔比: " << 100*done/total << "%" << std::endl
                  << "待接受資料佔比: " << 100-100*done/total << "%" << std::endl;
}

程式碼自己理解吧，這裡發一個QHttp幫助文件的連結，可以自己去看一看，不過是全英文的，可以用瀏覽器翻譯。這裡給出一張post過程的流程圖。